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Currently, the arm-smmu-v3 driver expects to allocate MSIs for all SMMUs with FEAT_MSI set. This results in unwarranted "failed to allocate MSIs" warnings being printed on systems where FW was either deliberately configured to force the use of SMMU wired interrupts -or- is altogether incapable of describing SMMU MSI topology (ACPI IORT prior to rev.C). Remedy this by checking msi_domain before attempting to allocate SMMU MSIs. Acked-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Nate Watterson <nwatters@codeaurora.org> Signed-off-by: Sinan Kaya <okaya@codeaurora.org> Signed-off-by: Will Deacon <will.deacon@arm.com> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.